Yeah, capitalism and communism have both had pretty bad implementations historically.

Imo the issue is down the us humans. For these systems to work correctly we need to act in good faith, but we are inherently corruptable.

These systems are like beasts that need to be tamed to work properly, but alot of the time the people in charge like to just throw their hands up and go "that's just how it works!" and not really do anything to fix the issues just because they're comfortable in the now.

We saw it in how Stalen corrupted Marx's ideals and ran the Russian State into the ground, and we see it with how western governments have let themselves be corrupted by the influence of big corporate interests.